强激光与粒子束2026，Vol.38Issue(1)：50-57,8.DOI:10.11884/HPLPB202638.250209
MW级回旋行波管曲面阴极结构磁控注入电子枪研究
Research on magnetron injection gun with curved cathode for megawatt-class gyrotron traveling wave tube
摘要
Abstract
[Background]Gyrotron traveling wave tube(Gyro-TWT)is a vacuum electronic device with broad application prospects.Magnetron injection gun(MIG)is one of the core components of gyro-TWT,and its performance directly determines the success or failure of gyro-TWT.From the current domestic and international research results on MIGs it can be seen that the working voltage and current of existing MIGs are mostly low,and the velocity spread is generally high,which cannot meet the requirements of future megawatt-class gyro-TWT for MIG.[Purpose]In order to meet the requirement for MIG with high voltage,high current,and low electron beam velocity spread in the development of megawatt-class high-power gyro-TWT,this paper presents a novel design scheme for a single anode electron gun.[Methods]The novel electron gun scheme introduces a curved cathode structure to reduce the velocity spread of the electron beam,while effectively increasing the cathode emission area and reducing the cathode emission density.[Results]The results of PIC simulation show that under the working conditions of 115 kV and 43 A,the designed electron gun has a transverse to longitudinal velocity ratio of 1.05,a velocity spread of 1.63%,and a guiding center radius of 3.41 mm.The thermal analysis results indicate that the MIG can heat the cathode to 1 050℃at a power of 76 W.[Conclusions]The simulation and thermal analysis results indicate that the designed MIG meets the design expectations and satisfies the requirements of high voltage,high current,and low electron beam velocity spread for megawatt level gyro-TWT.关键词
回旋行波管/磁控注入电子枪/高功率毫米波/曲面阴极/速度零散Key words
Gyrotron traveling wave tube/Magnetron injection gun/high power millimeter wave/curved cathode/velocity spread分类
信息技术与安全科学引用本文复制引用
李金帅,林显彩,岳玲娜,殷海荣,牛新建,刘迎辉,魏彦玉,包明明,徐勇,蔡茂,刘鲁伟,陈静,尹鹏程,蔡金赤,徐进..MW级回旋行波管曲面阴极结构磁控注入电子枪研究[J].强激光与粒子束,2026,38(1):50-57,8.基金项目
国家自然科学基金项目(62171108) （62171108）
中国电子科技集团公司第十二研究所项目(K2301287) （K2301287）
空间微波技术国家级重点实验室开放基金项目(HTKJ2023KL504007) （HTKJ2023KL504007）
